Automatic charging device for roasting-furnaces and the like.



L. SXNGER,

AUTOMATIC GHAEGING DEVICE Pon BOASTING PURNAGBS AND THE LIKE.

APPLICATION PILED MAE.22,1013.

Patented Sept. 2, 1913.

UNIE

LUDWIG einem, or nonnina, GERMANY.

AUTOMATIC CHABGING DEVICE FOR ROASTING-FURNACES AND THE LIKE.

Specicaton of Letters Patent.

Patented Sept. t?, 'itil 25.

Application led March 22, 1913. Serial No. 756,064..

evenly and without the aid of a laborer.

with materials which physically ditl'er Widely one from another, such as iron! pyrites, blende and the like, numerous charging-devices have been pro osed, but hitherto none ot' them has succeeif ed in performing this operation satisfactorily. For this reason not only the furnace itseltl but also the auxiliary apparatuses (chambers of lead, contact-furnaces etc.) are disturbed in their working and subjected to fluctuations, so that the laborer must assist airain and again. The reason :for this will be found on the one hand in the irregular charging; and on the other hand in the complicated devices employed to enforce a uniform charging of the furnace. 'In addition to this endeavors are made to regulate the volume of the charge introduced' into thc 'furnace per unit of time whereby the uncertainty of the working oi the furnace is made worse still. The present invention prevents these drawbacks by exchangeably arranging charging-vessels in the crown of the 'furnace in such a manner, that said vessels may be filled with chargingsmaterial by means of a rake attached to the'rotary urnaceshaft and emptied by the aid of a false bottom which is concentrically attached to said fur nace-shaft to rotate within the top-story of the furnace in close proximity to the lower end of said charging-vessels. To this end the latter are made bottom'less and said 'false bottom is 'provided with one or more discharge-openings arranged on a circle coinciding with the circle on which the charging vessels are arranged in the crown of the furnace, so that the vessels can be charged when a solid portion of said false bottom closes their lower end, and emptiedwhen a discharge-opening registers therewith. The variation of the volume of the charge to be introduced into the furnace per unit of time by the aid 'of said bottomless chargingvessels is accomplished in a very simple manner by employingl chalying-vessels of the same length but of a 4greater or lesser free crosssectional area, as circumstances may demand it. ly the aid of these simple gg means not only the volume ot the charge may be exactly regulated, but it is also made possible to till and empty said chargingvessels most regular-1 and without the aid of a laborer, because t 1e new ;:l1:n-gingdevice a5 operates automatically. Since. the charge can thus bc exactly fixed in accordance with the kind and quality o'tthe material under consideration a uniform operatir'm of the furnace und of the auxiliary apparatuses is 'm assured,

ln the accompanying; drawing: ----l`igure .l is a longitudinal"se-tionahview of: the upper part ot a roasting-iiunaee provided with my new c :harging-device. Fig. 9. is a 'M5 )lan-view ot' said roasti11g-furnace. Fig. 3 1S a plan-view of one halt of the falsmbottom, and Figs. 4t' and 5.are details ofsonstruction on a larger scale.

In the crown l oi" the furnace Q a facing- Zit ring 3 is arranged for thereeeption ot' the cover )late fl. Through the central opening 5 of tliis plate the tubular furnaceshaft (3. )asses upward and is guided in said plate 'y means of theI annular flange 7, Concen- B5 trieally to the lattcr.an annular wall 8 is erected vto Aform an annular space around vthe shaft G `for sealingrdnaterial, such as sand and the like, into which the downwardly directed flange 0 dips to i'orm a seal in order to 90 retain the heat and gases in the upper story l() of said furnace. 'lhc flange t) may form an integral part of the ring ll seated npon the Shaft C or it may he secured thereto in any suitable manner. 'lhe eoverqulate 4 is B5 provided with a iilurality ot openings' 12 for the reception of hottomless charging; vessels lil, which are cxehangeably seated 1n said plate. 'lo make the top of said charging-vessels .flush with the top-face of said cover-plate each openingr l2 is encircled at the underside of the cover-plate by a lip 14, on which rest lateral wings 15 of the chargingwcssels (Fig. 4). Since it is desirable to prevent the charging-vessels from rising duringr the chargingoperation, wings l() are provided on the (uwer-plate -l which project into each openingr lL in such a manner that when the chargingwcssel is introduced into said opening and rotated until the wings l5 are covered by the'wings ifi the chargingw'essel is securely held down. When in the usual the roasting-material is finely comminuted the simpler way of suspending the chargingve'ssels illustrated in Fig.- 5 where this is not the case, the above-described construction is to be preferred.l The tendency of the charging-'vessels'to rise is caused by the friction the lower parts of the charge contained in the vessels create on the tread 19, and in consequence thereof try to pass out between the tread 19 andthe lower vessel-rim. The charging-vessels may consist of iron, chamotte or of any other substance adapted to -withstand high temperatures. The Vessels are preferably closed at their lower end by a false bottom 17 consisting here of two halves to simplify securing it to the shaft 6 by means of the screws 18. The tread 19 of said falsebottom is provided with one or more discharge-openings 20 arranged equidistant with the chargingvessels from the axis of rotation. of the shaft 6. Above ,the'crown of the furnace the rake 21 is secured to the shaft 6 for. sweeping the roasting-material into said chargingvessels.

The operation is as follows I-After the volume of the charge to be introduced into the furnace per unit of time has been decided upon, charging-vessels of a suitable free cross-sectional area are inserted into the openings 12 and then'illed with roastingmaterial by means of the rake 21. To this end the wedge-shaped teeth 22 of said rake are arranged in such a manner as to move the material toward the center of the furnace when the shaft 6 rotates in the direction of the arrow. Since the arms of the rake 21 are related to the discharge-opening or discharge-openings 20 to prevent that the charging and emptying of said vesselscan'- not, take place simultaneously, it follows, that the roasting-material cannot pass directly through said charging-vessel into the top-story 10, but is retained by said vessels until a discharge-opening registers with the lower end thereof. At the moment this takes place, the roasting-material drops into the top-story and is manner toward the4 opening 23 of the partition-wall 24 by the aid of the ralre 25 likewise secured to the shaft-6. In order to prevent the escape of heat and gases between emptying and refilling said vessels, each vessel may be provided -with a loose sleeve 26, which prevents heat and gases from passing between the lower vessel-end and the tread 19 into the charging-vessels 13, and thence into the atmosphere. These sleeves also prevent that charging-material accumulates on said false botto1n,s1nee it follows any uneveriness in the tread 19 whlch may have been- .iused by warping through the heat of the furnace. After a chargingvessel has discharged its contents into the furnace the advancing tread 19 closes the will do, but

spread out and movedv l cover-plate, means to lower end of the vessel again, so that it can take up a new supply of charging-material.

lVhen it is desirable to introduce greater or lesser quantities of roasting material into the roasting-furnace per unit of time than hitherto, the charging-vessels in use until now are removed and replaced b y. others, the cubical contents of which are adapted to fulfill the new conditions, whereby the revolutions of the furnace-shaft have to be taken into account too. Instead ofV giving the charging-vessels a cylindrical shape,

any other shape might be employed, but

from a practical point of view this is not advisable. For a similar reason it would be unadvantageous to employ any of the known conical or ball-shaped closing-means operated by springs or counter-,weights instead of the simple false bottom, since such means require a constant attendance and,

cause frequent interruptions of the working of the roasting-plant.

' 1. An automatic roasting-furnaces and the like, a plurality charging-vessels and a rotatable false bottom provided with' a discharge-opening adapted to register successively with the lower end of eachof said charging-vessels.

2. An automatic charging-device for roasting-furnaces and *the like having a shaft, a plurality of -bottomless exchangeable charging-vessels arranged in the y,crown of the furnace equidistant from the shaft, and afalse bottom rotating in the top-story of said furnace in close proximity to the lower end of said charging-vessels and provided with a discharge-opening adapted to register in succession with the lower end of each of said charging-vessels.

3. An automatic charging-device for roasting-furnaces and the like, comprising a plurality of bottomless charging-vessels exchangeably arranged in the crown of the furnace, means for prevent-ing the rise of said charging-vessels, a false bottom continually rotating in the same direction in the top-story of said charging-vessels and provided with a discharge-opening adapted to register successively with the lower en of each of said charging-vessels, and yielding means for keepingl said charging-vessels in contact with said false-bottom.

4. An automatic charging-device for roasting-furnaces andthe like, comprising a cover-plate arranged in the crown ofthe furnace, a plurality of bottomless chargingvessels exchangeably sustained by sai prevent rising of lsaid chargin vessels, a false bottom arranged within t e top-story of said furnace beneath said charging-vessels and provided with discharge-openings adapted register successively with the lower end of each of'said comprising charging device for of bottomless exchangeablev char ing-vessels, and an extension-sleeve loose y arranged upon the lower end of each chargmgwessel.

5. An automatic charging device for roastin :furnaces and the like, comprising in com ination a coverplate arranged mv the crown ofthe furnace, a plurality of bottomless charging-vessels exchnngeubly seated in said cover-plate2 locking means preventing the rise of sald charging-ves sels, a rotary shaft projectin upward tlnou l1 said coverplate, a false ottom r0- tated y said shaft and provided with a discharge-opening adapted to register successively with the lower end of each of said charging-vessels, an `extension-sleeve encircling the lower end of each charging-ves sel and sustained by said false bottom, and a rake attached above said cover-plate to said shaft and adapted to sweep roastingmaterial from said furnace-crown into said charging-vessels. l

r(3. An automatic chargingdevice .for roasting-furnaces and the like, comprising in combination a centrally perforated coverplate arranged in the crown of the furnace, a pluralit of bottomless charging-vessels exchangeaily seated in said cover-plate, in-

ing adapted to i'cgiyer successively v ith the lower end of each of said chargingrcssels, an extension-member encirclinr; the lower end of each chargingwessel and sliding on the tread of said false-bottom, and

a rake secured to said furnace-shaft uiofef' said seal to sweep roasting-material into said chargmgwcssels. l

Signed by me at Barmen this 8th March 1913. t

LUDNIG SINGER. lin. a] Witnesses:

ll'nnnN Nm'en, ALBERT Numan.

day olif Af 5 

